USMLE World Score Correlation

Does anybody know how the UWorld self assessment score correlates aprox. to the USMLE?
I finished the first one and I had to guess a lot - I think I did really bad, actually (in comparison to my normal 60% in the normal UW Q-bank). Anyway, I got 490/216...., I have no idea what that means. :indifferent:

I have my test in 3 weeks